Lifting jack



Patented Jan. 29, 1935 Toledo, 011b,. "assignors' 1:0' .iThe Bing-ham LJ 7 ,corporationof Ohio cessive movement' offthescrew mmbe A furtherobject" of ith'eflirivention' "is the info vision 'ofe' lifting jack'casing or housing falbricalted of sheet material wherein the variousparts of the deir'iceere assembled and retained in fixed relation bysimple and inexpensive'means aiffording a, construction light in weig'fi. With excep- 20, tio'nal" rigfidness'" to withstand "strains arising"through the operation of the device. n I

Still anothei 'object is "the provision of a 'oaising or standard forthe liftingljack'fabrioated in such a" manner as tdretainJth'e Valriousrno'va ble fia rts 25 of the lifting jackin assembled relationshipWithoutthe' use of 'additionlifnieen's'. v U

Further objects anidfadva-ntages are; with th'e sciip'e-o'f this{invention spam -13min to 211 perfse,endtoieconoiii es-f 1 7nunierousjother' features as W111" b pp'ierit from may- -b'e brie of ourinventioii; v V. H

Figure 2 is a. horizontali section view takensub= "Figure 3 isosubstantially:horizontalwsecti'onal Figu-re 4 is a horizontalSBCEIQIiVitEW taken substantiallyq on the 1 *:4; QI Q igiF Q 4 While wehave-shown .0 nvention as em- *bodied in a; 'liftin ii jieikpartlgiiilerlyo'fthe that? actr adaptabi'efoi. us'eim elevatin'gutoi'notite' vehicles .for the i changing f tires irejp'iiifsf andthe, 1ike, it. is to be understood that our invention 5 is notnifiitdt"thepaiticuiar"construct on as.

' illustrated nor the uses mentioned, but; that we" contemplate7modified? constrfietioh's and other 'w eldi g, asatzi'. Bi th-is l nenthe ee sp ne-'1 and drawi'figs is-a vertieai-sectioifview-ef 'tliedevi'ce' t crtaiijth device ;-Stamping & Tool Company; Toledo; Ohio, o

in pwa,

thebase plate Bend the base portions i'i'isitfi sec ons beinglieldtogether prefera ly ture '15 made eiz'ciitionaily s orig and g1 and ywill not distort when exceptionally heavy ldids are "eievatea y'means ofthe lifting jaok o'f our f invention. I I 6" "di'iedwithin the tubuiar'eu qe zz rornied biri'iaortions 1 91 through the 'is'sernbly of seotio'nsf 11 anti 1315 an outer threaded member or s'c'revt 27 which isprov ded "with juna rieai bore 2s; throughout the major portion of itslengthythe threlded as at 29, this threaded portion support ingen innerscrew member 30. The inneri screw. 30 'supfiortsat its ui p'er extremityarloxi carry-'51 ing element -31 having an irregular uppermost; contourto facilitate engagement with the load elementtobe lifted, the member 31beingspro?" vi'd'ed wit-hen opening which snugly fits over;v a

, teiion 32'form'e'd on the up'pere'ndofthe screw' 3Q; the projectingportionof the tenonbeing;

recess 'or'h'ol'low portion 33' Within WhiCh'iS. po-

siti'orie'cla driving nut 34,-t11elatter being in-p Ger any threa ed toeon-petite with; the threads"; on'thexteriorsurfeee of screw 27;;thisnuti34 also being-romeo with gear teen ""e iil hr i t i b 111101138* which is 'jo1irr1'a11ed' 'in 'tub'ul be al'i'iiig port o 39 formedsan intei egtension otthe pper portionof st n assembled as follows:

rality of bearing balls 41, the latter engaging a race or thrust plate42, which is supported upon outwardly extending shoulder portions of thesections 11 and 12 forming the recess 33.

The driving pinion 38 is formed with an enlarged circular outer portion46 having an internal circular hollow portion 47 and a rectangular slot48 in the outermost wall of portion 46, the slot being particularlyadapted to admit the end of an operating handle or member of usualconstruction (not shown), which is suitably adaptable for rotating thedriving pinion ina manner well known in the art. The driving pinion 38is formed with an axially centralfbore 50 and a second axial bore ofreduced diameter 51. Slidably arranged Within the latter bore 51 is apin-like member 52 having, a -headr53. The driving pinion 38 alsosupports a transversely extending pin 54, and positioned between the pin54 and the head 53 of pin 52 is an expansible coil spring 55. Theextremity of pin 52 is adapted to engage the outer periphery of thebearing race 40, the latter being preferably provided with a depressionor detent 57 for suitable frictional coaction with the pin 52 in amannerto be hereinafter explained.

One of the features of applicants. invention lies in the simplicity ofassembly of the various parts which will now be described. The bearingraces and 42 and bearing balls 4l'are first' disposed within thesemi-annular recess in one of the sections 11 or. 12. The nut 34 and theouter and inner screws 27 and 30 have been previously A stop pin 58 isfirst driven in position in the lower end of the inner screw 30 and theinner screw threaded into the outer screw 2'7, after which the member 31is fitted over the tenon 32 of the inner screw and the latter swaged asat 36 to retain the member 31. The

'outer screw 27 is then threaded into the driving nut 34 and the extremeend threads of the outer screw-2'7 are distorted in a manner (not shown)to preventthe removal of the nut with respect to the outer screw.

The entire assembly of inner and outer screws and nut 34 is then placedin position in the recess 33 and the bore formed by the tubular portion19, the screws 27 and 30 projecting through the bearingannulus 40. Thedriving pinion 38 is then arrangement.

.able means as at 15..

'placed in its proper position after which the other section of the twosimilar half sections 11 and 12 is fitted in position and the flangesthereof spot welded or otherwise held together by suit- In the assemblyof the casing structure, the two similar sections 11 and 12 arepreferably temporarily spot welded ,as at- 15 to hold the parts in fixedrelation after which rivets 16 are applied forming a permanent rigid asfor example spot welding may be applied at several points, in lieu ofthe rivets 16, or other suitable means may be employed to hold the parts11 and 12 together. The driving pinion 38 when inserted in the finalassembly is already provided The sections 11 and 12 are providedwithflange.

portions 60 adjacent thelupper extremity thereof which engage the uppersurface of the driving nut 34 to prevent the removal thereof through'the open end 'of the casing or standard. In the It is to be understoodhowever, I that any suitable fastening means may be utilized "throughthe slot 48 into the hollow portion 47 of the driving pinion 38, thelatter being then rotated by the handle, the teeth of the pinion drivingthe nut 34. Due tothe expansive pressure of the coil spring 55 upon pin52, the pin frictionally engages a detent 57 in the annulus or ball race40, thus urging a portion of the inner wall of the bearing annulus intofrictional contact with the threads of the outer screw 2'7. Thisfriction means "normally prevents the screw 2'7 from rotating during thedriving action of the pinion 38 in enmeshment with the nut 34. Arotation of the pinion 38 the proper direction causes the nut 34' toturn relative to the threaded member 27, the latter being elevatedbecause rotation is normally prevented through the friction of the pin52 engaging the bearing annulus 40. The outer screw.

member 27, inner screw 30, and member 31 will be elevated as a unituntil the lowermost thread) on the member 27, which has been distortedtoprevent the member 2'7 from screwing entirely through the drive nut,engages the lower surface of the driving nut 34. Thereafter, furtherrota-1 tion of the driving nut 34 will overcome the friction of the pin52 in the detent 5'7, and nut 34 andthreaded member 2'7 will thereafterrotate as one unit. Due to the fact that the member 31 is in engagementwith the axle or other load to be lifted, rotation of the inner screw 30is prevented by reason of the weight of the article to be lifted, theouter screw 27 rotating with nut 34 will then cause the elevation of theinner screw 30, and the latter may be elevated until such time as thepin 58, carried by the lower end of the inner screw engages the end wallof the enlarged.

bore 28 within the outer screw-2'7, which of course determines themaximum lift of the jack.

To lower the jack from the elevated or extended position of the screws,the pinion 38 is rotated, in the opposite direction. The threaded member27 will then be non-rotatable with respect to the nut 34, by reason ofthe pin 52 again engaging the detent 57 in the ball-race 40 and themember 27 will be lowered until the uppermost thread, which has beenpreviously distorted to act as a stop, engages the upper surface of thenut 34. I

Whenthe member 27 has reached this lowermost position, it will rotatewith the nut 34 as a unit overcoming the friction of pin 52 with detent57,

and due to the relative rotation of threaded member 2'7-with respect tothe internal screw 30, the

latter will be then lowered as continued rotation of the pinion 38 takesplace until such time as the v upper screw is lowered away from theload.

It is apparent that, within the scope of the invention, modificationsand different arrangements may be made other than is herein disclosed,and the present disclosure is illustrative merely, the inventioncomprehending'allvariations thereof.

What we claim is:

1. In a device of thebharacterdisclosed; a N

standard; a plurality of telescopically arranged members movable withinsaid standard; an antifriction bearing supporting one of said members;

:and means engageable with said bearing foriconstrolling anovementnof:one of said members.

' :2, :A lifting :jack comprising a standard; a rotatable driving:member supported orrsaid standard;. an antifriction :bearingpositioned'fbetween said: driving member and said standard a= pluralityof r telescopically arranged: threaded. members associated with saiddriving member; and means co-aoting with said .bearing'for controllingthe; movement of saidithreaded members.

. 3. AT lifting, jack. comprising a standard; a: ro-

tatable' driving memberlsupporte'd. on saidstandard; fan antifrictionbearing: positioned between :said drivingmember andh said standard; aplurality'of telescopically arranged threaded mem- "bers associated withsaid; driving member; and

friction means co -acting with said bearing. for controllingthe:relativerotation; of said threaded members with respect toithe standard.

4. In a device of the character disclosed, in combination a standardformed of sheet material and having a tubular portion; a threadedmembermovable in said tubular portion; a driving nut for said threaded member;a bearing supporting said driving nut; a pinion journalled upon saidstandard and co-operating with said driving nut; and means interposedbetween said pinion and said bearing for controlling the movement ofsaid threaded member.

5. In a device of the character disclosed, in combination a standardformed of sheet material and having a tubular portion; a threaded membermovable in said tubular portion; a driving nut for said threaded member;a bearing supporting said driving nut; a pinion journalled upon saidstandard and co-operating with said driving nut;

and means carried by said pinion and engageable with said bearing forcontrolling the movement of said threaded member.

6. A lifting jack comprising a sheet metal casing, certain portions ofsaid casing having flanges; means for securing said flanges together toprovide a reenforced tubular guide; an integral lateral extension formedon said casing to provide a cylindrical tubular bearing; a liftingelement guided for movement in said casing; a driving element mountedfor rotation in said bearing; and means carried by said driving elementand cooperatively associated with the lifting for controlling themovement of said lifting element.

7. A lifting jack comprising a sheet metal casing, certain portions ofsaid casing having flanges; means for securing said flanges together toprovide a reenforced tubular guide; an integral lateral extension formedon said casing to provide a cylindrical tubular bearing; a threadedlifting element guided for movement in said casing; a driving nuttherefor; a driving pinion cooperating with said nut and mounted forrotation in said bearing; and means carried by said driving pinion andcooperatively associated with the lifting element for controlling themovement of said'lifting element.

8. A lifting jack comprising a sheet metal casing, certain portions ofsaid casing having flanges; means for securing said flanges together toprovide a reenforced tubular guide; an integral lateral extension formedon said casing to provide a cylindrical tubular bearing; a liftingelement guided for movement in said casing; a driving element mountedfor rotation in said bearing; and means carried by said driving elementcooperatively associated with the lifting element for controlling themovement of said lifting element,

said, casing having; a. re-enforcing; flanged base z member securedthereto.

9. A lifting jack comprisinga she e t metal cas- "ing,:saidcasingbei-ngzformedof similar sections,

said sectionsnhavingflanges; means for securing ythe; flangesof-zsaid-se ct ions together to provide :a re-enforced tubular guide;*an integral lateral -extension.,;formed on saidcasing-to provide acylindrical ;:tubular bearing; a lifting element guided forwmovement"insaid casing an 'antifricrtion gbearing supporting said-lifting:element;;a driving. element; mounted i for, rotation -"insaid tubularbearing and means: carried. byisaid \driving element and engageablerwithsaid antifrgic- "tion bearing for-controlling the movement-iof saidlifting element. .510. A lifting ,jack comprising 'a standard; :a

:rotatable interiorly threadeddriving nut mounted in the standard saiddrivingrnuthavinga toothed portion; a screw threaded into said drivingnut; a second screw threaded into the first mentioned screw; a drivingpinion journalled in said standard meshing with the teeth on saiddriving nut; and cooperating means interposed between said pinion andouter screw for. normally resisting rotary movement of the latter byyielding to permit the outer screw to turn with the driving nut when atthe limits of its vertical movement.

11. A lifting jack comprising a standard; a rotatable interiorlythreaded driving nut mounted in the standard; an antifriction bearingcooperating with said nut, said driving nut having a toothed portion; ascrew threaded into said driving nut; a second screw threaded into thefirst mentioned screw; a driving pinion journalled in said standardmeshing with the teeth on said driving nut; andmeans carried by saidpinion cooperating with the bearing for normally resisting rotarymovement of the outer screw by yielding to permit the outer screw toturn with v ,in saidcasing;a driving means for said driving nutjournalled in said bearing portion, each section being formed with aflange at its upper end engageable with the upper surface of said nutfor retaining the latter in position, and each section of said standardbeing provided also at its lower extremity with an integrally formedtransversely extending base portion, said base portion having peripheralflanges; and re-envforcing ribstintegrally formed on each sectionconnectingthe base portion with the upright tubular portion.

13. In a device of the character disclosed, in

combination, a standard; a lifting element in'said standard; a drivingnut therefor; a pinion coop crating with said driving nut; and meanscarried by said pinion and cooperatively associated with said liftingelement for controlling movement of said lifting element.

14. In a device, of the character disclosed, in

combination, a standard; a lifting element in said standard; a drivingnut therefor; a pinion cooperating with said driving nut; and meanscarried by said pinion and resiliently urged into said cooperativeassociation with said lifting ele- I ment for controlling the movementofthe lifting element. v

15.A lifting jack comprising a sheet metal casing,said casing beingformed of similar sections, each section having flanged portions; meansfor securing the flanged portions together, said standard being formedwith a vertical tubular boreand a transversely extending bearingportion; a lifting'element positioned in said vertical bore; adrivingmeans for said lifting element journalled in said bearing portion, eachsection 'of said standard being provided at its lower extremity with anintegrally formed transversely extending base portion, each base portionhaving peripheral upwardly projecting flanges, abase plate havingsimilarly formed peripheral flanges arranged to contact with the flangeson said base portions in telescopic relation.

16. Ina device of the character disclosed, a. standard; a plurality oftelescopically arranged members rotatably supported within saidstandard; aubearing supporting one of said members;

and resilient means engageable with said bearing for urgihg the latterinto frictional engagement with one of said members for controlling therotation thereof. 1'7. In a device of the class disclosed, a standard;an outer screw member and an inner screw -member disposed within saidstandard; a bearing

